CN101005234A - Tubular electrical machines - Google Patents
Tubular electrical machines Download PDFInfo
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- CN101005234A CN101005234A CNA2007100002685A CN200710000268A CN101005234A CN 101005234 A CN101005234 A CN 101005234A CN A2007100002685 A CNA2007100002685 A CN A2007100002685A CN 200710000268 A CN200710000268 A CN 200710000268A CN 101005234 A CN101005234 A CN 101005234A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
- H02K55/02—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
- H02K55/04—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type with rotating field windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
- H02K11/012—Shields associated with rotating parts, e.g. rotor cores or rotary shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
- H02K55/02—Dynamo-electric machines having windings operating at cryogenic temperatures of the synchronous type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
- H02K33/04—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation
- H02K33/06—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation with polarised armatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Superconductive Dynamoelectric Machines (AREA)
- Linear Motors (AREA)
Abstract
The current invention provides an improved synchronous tubular electrical machine comprised of a radially outer member (2) that has a substantially cylindrical inner surface, a radially inner member (5) that is substantially cylindrical and is coaxially disposed within the outer member (2) such that it may move reciprocally relative to the outer member (2) in the axial direction. A plurality of axially spaced circumferential armature coils (1) are electrically insulated from one another and are formed as part of one of the outer member (2) and the inner member (5). A plurality of axially spaced circumferential superconducting coils (4) are formed as part of the other of the outer member (2) and the inner member (5). During operation of the tubular machine, each superconducting coil (4) is maintained in a superconducting state and an electrical current is supplied to each superconducting coil (4) in such a manner that the current flowing around each coil is in the opposite direction to the current flowing around the coils adjacent to it.
Description
Technical field
The present invention relates to tubular electrical machines, particularly relate to the tubular electrical machines that is suitable as direct driven electric generator or linear motor.
Background technology
Well-known is to utilize linear electric motors as the generator that will be generally reciprocating rectilinear motion input changing into electric power, perhaps as producing straight-line motor from power supply.Most of straight line machine (following be called again " linear electric motors ") are used floor plan, and this is arranged based on conventional electric rotating machine is separated to form the working method on plane.A defective of this layout is that the mechanical support of the flat components of motion may be very complicated.Another defective is that the same with electric rotating machine, planar linear motor generally includes the end winding that does not have help for the energy converting between mechanical process.
Tubular electrical machines is also behaved known, and works according to the mode substantially the same with these linear electric motors.Tubular electrical machines can be thought such linear electric motors, and it is wrapped, and makes that the coil in the flat components of previous linear electric motors becomes circle, does not therefore comprise the end winding.Cylinder type has other benefit, that is, these machines are very firm in essence, and its mechanical support is much simpler than the mechanical support of conventional linear electric motors.One of can be in two ways constitute based on the cylinder type machine (following be called again " tubular electrical machines ") of permanent magnet.The circular coil of armature winding can be formed in the groove, this groove is arranged on the basic in the columniform outer surface of inner radial parts, this internal part is surrounded by radially outer cylinder type parts, and these cylinder type parts have to comprise how the basic of row's permanent magnets is columniform inner surface.The tubular electrical machines that uses permanent magnet has by this way been described in United States Patent (USP) 6787944.As selection, these many row's permanent magnets can place the basic of inner radial parts to be columniform outer surface, and the coil of armature winding can be formed at the basic in the groove in the columniform inner surface of radially outer parts.In both cases, when using tubular electrical machines, normally external component keep static and internal part with respect to the external component reciprocating motion.Also opposite situation can occur, but this opposite situation is more rare usually, because more be difficult to realize mechanical support for the tubular electrical machines of working by this way.Tubular electrical machines also can be the solid salient pole synchronous electric machine that twines magnet exciting coil that has of induction type or reluctance type, and they can constitute according to the mode identical with the tubular electrical machines that uses permanent magnet.
There are several problems in the structure and the work of conventional tubular electrical machines.At first, the parts (according to the concrete structure of tubular electrical machines, can be radially outer parts or inner radial parts) that comprise armature winding are made of magnetic material such as iron etc. usually.In large cylinder type motor, that wave energy is converted to the machine of electric energy is the same with being designed for, the formation of vortex flow is subject matter in the magnetic part, and this problem can only solve by utilizing amorphous magnetic material expensive and poor efficiency often or expensive manufacture process.Proposed design, but the power factor and the efficient of these designs at present are lower at the permanent-magnetic cylindrical type motor that does not use magnetic material.
Another problem is the peak-to-average power ratio of existing permanent-magnetic cylindrical type motor.Because the various electromagnetism restrictions in these machines, its peak-to-average power ratio is usually less than 3: 2.This means that tubular electrical machines has to almost carry out Electromagnetic Design at peak power, and do not have very big short-time overload capacity.Especially this is a problem in such as application scenarios such as employing wave energy generatings, and this is because peak-to-average power ratio is very high usually in this occasion.
Several designs at superconducting rotary machine have been proposed.Current design for large-scale superconducting rotary machine mainly is to adopt the conventional synchronous machine of superconduction excitation winding and routine or non-superconducting armature winding to arrange, this obtains disclosing in european patent application 1247325.Can make this superconduction synchronous rotation motor more much smaller than conventional synchronous rotation motor with same nominal power.This is because can realize very high current density by superconduction excitation winding, therefore can realize higher magnetic flux density.
Summary of the invention
The invention provides a kind of tubular electrical machines, comprising: the radially outer parts, it has the basic columniform inner surface that is; The inner radial parts, the inside that it is arranged on described external component coaxially makes that described internal part can be vertically with respect to described external component reciprocating motion; The armature coil of a plurality of axially spaced-aparts, it is electrically insulated from each other and forms the part of one of described external component and internal part; And the superconducting coil of a plurality of axially spaced-aparts, it forms in described external component and the internal part another a part; Wherein, in the course of work of described tubular electrical machines, each superconducting coil remains on superconducting state, and electric current is supplied to each superconducting coil by this way, and is promptly opposite around the mobile direction of the electric current direction that flows and the electric current that centers on axially adjacent one or more coils of each coil.
The high-intensity magnetic field that superconducting coil can produce can be used for overcoming some problems that conventional tubular electrical machines is run into.In addition, because superconducting coil can produce higher field density, can be little more a lot of according to tubular electrical machines of the present invention than the permanent-magnetic cylindrical type motor of same nominal power.
The high field density that superconducting coil produced also means can make the parts (that is, according to the concrete structure of tubular electrical machines, being inner radial parts or radially outer parts) that comprise armature coil not use magnetic material basically.This causes tubular electrical machines to have lower reactance, so the short-time overload capacity that improves greatly can be provided.For example, in tubular electrical machines according to the present invention, if make the parts that comprise armature coil not use magnetic material basically, overload capacity can be six times to ten times of the machine of this rated power so, even higher multiple.The big AC tubular electrical machines that adopts the nonmagnetic parts of this integral body to construct to have unity power factor.This has eliminated fully in the magnetic material with conventional tubular electrical machines and has produced the relevant problem of vortex flow.This can use any suitable nonmagnetic substance, but preferably use lower cost materials such as concrete etc., because can reduce the total cost of machine greatly.Also, heat help to make armature coil to remain on suitable working temperature such as materials such as concrete away from armature coil by being conducted.
If physical size is than the prior factor of cost, by armature coil being included in the parts with magnetic part adjacent, can obtain littler tubular electrical machines so with armature coil.In this case, must take suitable method as well known to those skilled in the art to control vortex flow.Yet Gou Zao tubular electrical machines is more much smaller than the conventional tubular electrical machines with same nominal power by this way.
In order to improve the mechanical stiffness of the parts that support armature coil, preferably, armature coil separates each other vertically by distance piece.These distance pieces are preferably nonmagnetic, and have low electric conductivity.For example, the epoxies material that can be basically strengthened by glass of distance piece constitutes.Can place the rod that high conductivity material constitutes in these distance piece inside vertically.Yet, be appreciated that for work these distance pieces are not to be essential, and can use directly axial each other adjacent armature coil according to tubular electrical machines of the present invention.
If the heat conduction is formed at armature coil in the external component away from the performance of armature coil in order to provide improved, preferably have such distance piece, but promptly it is made of the material of non magnetic and low electric conductivity basically and comprises and a plurality ofly radially extending and circumferentially spaced high heat conductive rod.Described rod can have and the essentially identical length of distance piece.As selection, for improved heat-conductive characteristic is provided, preferably, described rod stretches out the outer surface of distance piece and stretches in the body of external component.In this case, the exact length of described rod and the degree that stretches in the external component body thereof will depend on design factor, such as the cooling degree of armature coil required in the thickness of external component and each the concrete machine.Described rod can by conductive material for example mild steel constitute, as long as described rod has suitable shape and small cross section and is electrically insulated from each other just passable.Because described rod is radially arranged, this guarantees can not form big vortex flow in described rod.For example, if described rod is made of steel, so described rod can have the circular cross section of diameter between 0.5mm to 5mm.As selection, described rod can have rectangular cross section, and the length on each limit of cross section is between 0.5mm to 5mm.Yet, be appreciated that top described only be as an example, contact rod can have the suitable any shape of cross section of size that can not form big vortex flow in every rod.
Each superconducting coil preferably is made of at least one circle superconductor.Superconductor can be low-temperature superconducting (LTS) line, perhaps more preferably, is high-temperature superconductor (HTS) line, cable or band.The LTS line comprises the Nb that has about 4.2K working temperature usually
3Sn and NbTi line.
The HTS material comprise the Metal Substrate filament (Bi, Pb)
2Sr
2Ca
2Cu
3O
10Hyperconductive cable and band that line that constitutes and band are made.This material has the superconducting temperature (Tc) of 110K.The same with other HTS material, this material has by the lattice structure that copper-the oxonium ion face constitutes that is clipped between the insulation ion block.Therefore, supercurrent is limited to two dimension and flows, and this means that the electrical characteristics of HTS material and magnetic characteristic can be decided by its orientation about electric field or magnetic field.A manufacturer that can obtain above-mentioned BSCCO-2223HTS material is AmericanSuperconductor (AMSC), HTS Wire Manufacturing Facility of JacksonTechnology Park, 64 Jackson Road, Devens, Massachusetts 01434-4020, United States of America.Recognize that easily these superconductors only are to provide as an example.The improved greatly second generation of performance applies superconducting line and develops, and depends on cost, and the use of these lines may be preferred.The example of second generation superconductor comprises the YBCO (YBA that is being developed by American Superconductor (AMSC)
2Cu
3O
7-δ), by HTS R﹠amp; D Department of Sumitomo Electric, 1-1-3 Shimaya, Konohana-ku, Osaka 554-0024, the HoBCO (HoBa of Japan exploitation
2Cu
3O
7-x).
According to the physical size of tubular electrical machines and expectation power, each independent superconducting coil is made of a plurality of subcoils, each subcoil constitute by the multi-turn superconductor and every circle in electric current flow towards identical direction.Between coil and the inside of each coil can also have supporting construction.If coil is the HTS coil, so preferably, each coil is made of a plurality of independent cheese superconduction subcoils, and these subcoils are with the stacked and connection of supporting construction that is formed between the subcoil.The inner support method of the racetrack-type rotor coil that can be applied to the application is disclosed in European patent EP 1212760.
Two superconducting coils must be arranged at least, but the total quantity of the superconducting coil that uses in the tubular electrical machines is determined by the design factors such as expectation rated power, size and cost such as machine.In use, be each superconducting coil supply of current, the flow direction of this electric current be supplied to opposite with this coil axes to the flow direction of the electric current of adjacent and one or more superconducting coils of separating.This has following effect, that is, impel magnetic flux in the end play between the opposite electric current towards radially, thereby produce north and south poles alternately between the superconducting coil in these gaps.If there is plural superconducting coil, so preferably, end-coil has around its different total current that flows (ampere circle), so that keep the field density unanimity along the whole axial length that comprises superconducting coil.This can realize by the following method,, for the different electric current of end-coil supply, perhaps changes the number of turns that constitutes each end-coil that is.In addition, in order to ensure the exact current supply of each superconducting coil, preferably, all coil is electrically connected, to form single superconduction winding.
For the low-resistance magnetic flux path being provided for the magnetic field that superconducting coil produced, comprise that the parts (according to the concrete structure of tubular electrical machines, can be radially outer parts or inner radial parts) of superconducting coil preferably are made of magnetic material basically.If superconducting coil is included in the external component of tubular electrical machines, external component may comprise the ring of magnetic material at least so.For example, if external component is to have substantially to be the pipe of columniform surfaces externally and internally, so whole external component can be by the magnetic material manufacturing.As selection, if superconducting coil is included in the inner parts, internal part will preferably comprise the strutting piece of magnetic material at least so.Employed magnetic material is decided by to comprise the working temperature and the stress of the parts of superconducting coil.Because the flux when tubular electrical machines is worked in these parts is DC, so magnetic material can be in the magnetically saturated substantially state, and do not cause any extra loss.In addition, if expectation reduces the quantity of superconducting line, can reduce saturation capacity by more magnetic material is provided.Comprise that the outer surface on the axial length of parts of superconducting coil is also preferably centered on such as the lining that copper or aluminium etc. constitutes by high-conductivity metal.This lining will form the low impedance path of vortex flow, thereby the shielding superconducting coil exempts from the AC magnetic flux that harmonic wave in the armature coil and load variations cause.
Superconducting coil preferably remains on its working temperature by low-temperature cooling system.This is a kind of like this cooling system, and its specific features with tubular electrical machines remains on the required specific low-temperature working temperature of superconducting coil.Low-temperature cooling system can be enclosed in the cryostat of this internal system for closed-loop system and superconducting coil.The structure of this system and employed cooling agent depend on each tubular electrical machines specific design, be to use the HTS coil or use the LTS coil and the optimum working temperature of coil.
In this tubular electrical machines, low-temperature cooling system need be with the parts reciprocating motion that comprises superconducting coil, therefore, if the power that reciprocating motion produced is in the rational tolerance interval, just can use Gifford McMahon or Stirling recirculation cooler.For example, if tubular electrical machines is the generator that is used for converting wave energy, the peak velocity of moving component is about 2 to 3m/s in several meters stroke so.These subcolling condensers are easy to bear this power.Yet if low-temperature cooling system bears the very big power that reciprocating motion produces, pulse tube cooler will be as extra support so.Above-mentioned subcolling condenser provides as just example, and those skilled in the art can know most other low-temperature cooling system.
If superconducting coil is made of the HTS material, the cooling agent that uses in the low-temperature cooling system will depend on the optimum working temperature of coil so.If the working temperature of superconducting coil in 30 to 40K scope, can be used gaseous helium so, because this is suitable for 5 to 77K temperature.As selection, use the phase transformation system of neon can be used for the superconducting coil of working temperature near neon boiling point (27K).For the superconducting coil of higher temperature, promptly working temperature is 65 to 77K superconducting coil, is more suitable for using liquid nitrogen as cooling agent.If superconducting coil is made of the LTS material, need to use the liquid helium of 4.2K so, in this case, need specific liquid helium low-temperature cooling system.These cooling agents only are to provide as an example, can recognize, those skilled in the art can use the knowledge of self and select low-temperature cooling system of the present invention.
Low-temperature cooling system can also be used to cool off at least a portion of the parts that comprise superconducting coil.Preferably, if superconducting coil is made of the HTS material, comprise that so the part of the parts of superconducting coil is made of magnetic material, this magnetic material has suitable mechanical property under the working temperature of HTS material.The example of suitable magnetic material that is used to comprise the parts of superconducting coil is 9% ferronickel, as " Magnetic Properties of 9%Nickel Steel atRoom and Cryogenic Temperatures " by H.Brechna, SLAC TechnicalNote TN-65-87, Stanford Linear Accelerator Center, StanfordUniversity, Stanford, California, (1965) described, this material has good mechanical property and magnetic characteristic at low temperatures.The dilval that the nickel ratio is higher also is suitable for, but because nickel is expensive alloying element, usually preferably, it is minimum making nickel content.
The cooling of at least a portion that comprises the parts of superconducting coil makes that superconducting coil can be more near magnetic material, and this will reduce the magnetic resistance magnetic flux path in magnetic field that superconducting coil produces.If superconducting coil is installed on the internal part of tubular electrical machines, this structure can realize in the following way so, promptly, internal part on the axial length that comprises superconducting coil is made of 9% ferronickel basically, and by whole internal part (comprising superconducting coil) being enclosed in the cryostat and the temperature of internal part is remained on cryogenic temperature.The advantage of the magnetic material that use is cooled is to reduce the quantity of the HTS material of realizing required magnetic flux density in the armature coil and needing.
As selection, low-temperature cooling system can be used for only superconducting coil being remained on its working temperature, and in this case, coil can be by cryostat or other thermodynamic barrier and with the parts thermal insulation of tubular electrical machines.Preferably, the parts that comprise superconducting coil are made of the material that has inadequate material behavior under the working temperature of superconducting coil.This means and to use the low-cost magnetic material that does not have proper characteristics at low temperatures.This examples of material is a mild steel.
At present, the magnetic material that has proper characteristics at low temperatures is very expensive.Therefore, directly to contact with superconducting coil and keep at low temperatures parts also to be to use the selection of adiabatic thermal part mainly be a cost problem about being to use.Present HTS material is expensive, is cost-effective by using cold parts to make the length minimum of the required HTS material of formation superconducting coil therefore.Yet, can expect that the cost of appropriate H TS material is reducing in the future, adopt with the mild steel sections formation tubular electrical machines according to the present invention of superconducting coil thermal insulation cost is lower at that time.
Each armature coil preferably is made of and comprises the circular coil of a series of circles or multi-turn lead stranded conductor, and arranges with one heart with superconducting coil.Eddy current losses in the armature coil, preferably, stranded conductor such as the enamel-cover twisted wire that each coil is replaced fully by multi-turn etc. constitutes, and this conductor can be made of for example copper basically.
Each armature coil preferably interconnects, thereby forms one or more armature winding.For example, coil can connect, to form one or more three-phase AC windings.Yet, also can adopt much other connected modes, be appreciated that those skilled in the art is familiar with these connected modes very much.
Tubular electrical machines according to the present invention comprises superconduction (or field) winding and the armature winding of separation, and under limit, mechanical movement can be for such, that is, the magnetic field that produces in each winding is synchronous.In other words, tubular electrical machines is preferably synchronous tubular electrical machines.Recognize that easily according to the purposes of machine construction and expectation, tubular electrical machines according to the present invention can be used as interchange (AC) or direct current (DC) machine operation.
The outer surface of the external component of tubular electrical machines preferably is cylindrical substantially.This provides intrinsic mechanical strength and the rigidity that is derived from its integral barrel type shape for tubular electrical machines, makes this tubular electrical machines to bear better and act on oneself power on one's body when its work.If armature coil is contained in the external component, this structure also helps to cool off armature coil.
Usually preferably, external component keeps static and internal part moves back and forth with respect to external component.This is because provide mechanical support much easier usually to the tubular electrical machines of working by this way.Certainly, also can make internal part keep static, and external component move back and forth with respect to internal part.
If this tubular electrical machines keeps static mode to work with external component, so preferably, armature coil forms the part of external component, and superconducting coil forms the part of internal part.Adopt this structure, the main power circuit that links to each other with armature coil is connected and does not need motion, and the cooling of armature coil is much easier.Yet any low-temperature cooling system and the exciter that are used for superconducting coil will need to move with internal part.Preferably, be low-temperature cooling system and exciter power supply by flexible cable from the remote source that is connected with internal part.The magnetic field that superconducting coil produced also will be with respect to the external component and the surrounding structure reciprocating motion of tubular electrical machines.Therefore, if the external component of tubular electrical machines is nonmagnetic substantially, stray flux this machine of may overflowing so.This does not make us expecting really, because the stray flux of overflowing will be moved with respect to surrounding structure.A method that solves the stray flux problem is, for external component provides electromagnetic shield.This shielding part needn't be continuous around the periphery of external component because the principal direction of stray flux be tubular electrical machines axially and radially.In fact, make shielding part have technical advantage, because that will help flowing of vortex flow and cause eddy current losses along circumferentially discontinuous.A kind of preferred arrangement of shielding part is the plate that the outer surface around external component is installed a plurality of magnetic materials, makes the axis coplane of each plate and external component.These plates can center on this outer surface regularly at interval, and preferably separate each other.These plates radially stretch in the external component.These plates can be made of any suitable magnetic material, but preferably are made of steel.
In order to obtain other benefit, the plate that forms electromagnetic shield can stretch out (perhaps, alternatively, stretching out the non-magnetic region of external component) from the outer surface of external component, thereby is used as the cooling fin of armature coil.The quantity of the thickness of the plate that uses in the electromagnetic shield and the plate that is provided with around external component is for like this, and promptly when tubular electrical machines was worked, plate was not magnetically saturated.On the other hand, these plates must be as thin as is enough to have acceptable eddy current losses.Therefore, according to the precise design of tubular electrical machines, can use the thickness of slab of certain limit.
Optionally preferable mask part arrangement is externally to form the rod that a plurality of axial metals strengthen in the parts, the easier formation of this layout, but can not provide cooling for machine.Preferably, at each concrete machine, quantity, diameter, shape and the position of the rod part as the Electromagnetic Design process is optimized.Be appreciated that those skilled in the art will learn other shielding construction easily.Can expect that by suitable electromagnetic shield is added in the tubular electrical machines, it is about 10% that electric power output is improved, otherwise this tubular electrical machines will suffer stray flux loss.
If superconducting coil is formed in the external component, and armature coil is formed in the internal part, if it is static that external component keeps, can eliminate the problem of stray flux effusion tubular electrical machines so, because superconducting coil keeps static with respect to the surrounding structure of tubular electrical machines always.The low-temperature cooling system and the exciter that are used for superconducting coil also will keep static, so their structure is with much simple.Yet the major defect of the tubular electrical machines of Gou Chenging is by this way, and the main power source of armature coil connects and will have to move with internal part, and will be more difficult from the armature coil heat radiation.
In the structure according to tubular electrical machines of the present invention, the relative length of external component and internal part is another important consideration.This item is definite by following factor, that is, and and the quantity of required superconducting line, machine power and haul distance in the support of external component and internal part, the machine.At present, superconducting coil and relevant low-temperature cooling system thereof are expensive component in the tubular electrical machines, it is therefore preferable that the minimum number that makes superconducting coil.This can realize in the following way,, makes axial length minimum that comprises superconducting coil or the spacing that increases superconducting coil that is.Yet, can recognize that the cost of superconductor will reduce in the future, may more preferably have more superconducting coils at that time.In preferred aspects of the invention, the axial length of internal part is about twice of the axial length of external component.
Importantly, internal part and external component are relative to each other supported, and make one of them carry out axial motion freely with respect to another, make preferably to have minimum mechanical friction and bearing arrangement.For example, if parts keep static and much longer than another parts, sliding bearing or rolling bearing one of can be formed in the outer surface of the inner surface of external component or internal part so, and the bearing track of collaborative can be formed in opposite directions the surface.Yet, to understand easily, the bearing between internal part and the external component can be formed by the multiple alternate manner that the technical staff understood of being familiar with employed kinds of bearings in the conventional tubular electrical machines synchronously.
Can be used for multiple use according to tubular electrical machines of the present invention.Yet owing to need carry out thermal insulation to cold parts, therefore, what these machines were preferably used in superconducting coil wherein typically has a diameter from 200mm or bigger large-scale application scenario.Particularly preferred application example is to be used at the generator of offshore position from the wave energy generating.Can be applied to large-scale motor with reciprocating movement equally.
Description of drawings
Fig. 1 is the Section View according to tubular electrical machines first embodiment of the present invention;
Fig. 2 is the enlarged drawing of tubular electrical machines shown in Figure 1;
Fig. 3 illustrates the enlarged drawing of local peripheral part of the distance piece of tubular electrical machines shown in Figure 1;
Fig. 4 illustrates the internal part of tubular electrical machines shown in Figure 1;
Fig. 5 illustrates internal part shown in Figure 4, wherein removes cryostat wall and shielding part;
Fig. 6 is the Section View of internal part shown in Figure 4;
Fig. 7 illustrates and works as the tubular electrical machines shown in Figure 1 schematic diagram of superconducting coil surrounding magnetic field in use;
Fig. 8 is the Section View according to tubular electrical machines second embodiment of the present invention;
Fig. 9 illustrates the Section View according to tubular electrical machines the 3rd preferred embodiment of the present invention;
Figure 10 is the cutaway view that passes according to the internal part of tubular electrical machines the 4th preferred embodiment of the present invention; And
Figure 11 illustrates internal part shown in Figure 9, wherein removes cryostat wall and shielding part.
Embodiment
Now with reference to first embodiment of Fig. 1 to Fig. 6 description according to tubular electrical machines of the present invention.In this first embodiment, the armature coil 1 of a series of axially spaced-aparts is contained in the tubular radially outer parts 2.Armature coil 1 is made of the non-superconducting line, and is supported on the nonmagnetic non-conductive structure.Because there is not the magnetic tooth of flux around the guiding armature coil 1, therefore must be with armature coil 1 stranded and transposition (transposed) avoiding eddy current losses, this can realize by for example utilizing the enamel-cover twisted wire.The general diameter of armature coil 1 is 700mm.Because the current density in the superconducting coil 4 is higher, therefore do not need the magnetic core that links with armature coil 1.Each armature coil 1 is joined together to form and is connected the three-phase AC armature winding that (not shown) links to each other with main power circuit.Armature coil 1 separates each other vertically by thin distance piece 3, and each distance piece is made of the glass reinforced epoxy basically, and comprises a plurality of radially extensions and circumferentially spaced rod iron 3a, and this as shown in Figure 3.Rod iron 3a stretches out outside the distance piece 3 and stretches in the body of external component 2, thereby the heat transmission of 2 improvement is provided from armature coil 1 to external component.Rod iron 3a is electrically insulated from each other and has less diameter, makes wherein can not form very big vortex flow.
The external component 2 that surrounds armature coil 1 is made of concrete basically, and can have the external diameter of about 800mm in representative instance.External component 2 is preferably formed and is independent monomer foundry goods, but it also can be made of a series of axially stacked concrete layer overlapping piece or the foundry goods that are divided into a plurality of axial direction parts.This concrete allows heat is cooled off armature coil 1 by the water jacket (not shown) that concrete conducts on the outer surface alternatively.Such tubular electrical machines can work in the average power of 150kW and the peak power of 1000kW.
Inner radial parts 5 place the inside of external component 2 coaxially, to such an extent as to be to have less radial air gap between the columniform inner surface internal part basic substantially for columniform outer surface and external component.Superconducting coil 4 is arranged in the groove of a series of axially spaced-aparts on the outer surface of internal part 5, and these grooves are defined between the support section 13.Superconducting coil 4 is positioned at cryostat 6 inside of vacuum insulation.The simple circular solenoid coil of superconducting coil 4 for adopting commercially available HTS band to twine.For example, each coil 4 can comprise the BSCCO-2223 band of 4000 circle conveying 200A electric currents, and wherein Dai cross section is roughly rectangle, and typical dimensions is that 4mm is wide and 0.2mm is thick.Superconducting coil 4 arranges that in pairs the current polarity in two coils of every pair is opposite.The polarity of electric current is represented by arrow in Fig. 5.
Axle journal 7 is arranged on each end of internal part 5.The bearing (not shown) can be for example sliding bearing, rolling bearing, active magnetic bearings or passive superconducting magnetic bearing system.
When using this tubular electrical machines, external component 2 keeps static, and internal part 5 externally components interior move back and forth.The maximum length of stroke of this tubular electrical machines is designed to equal to be provided with on its of internal part 5 the poor of axial length that armature coil 1 is set on its of the axial length of superconducting coil 4 and external component 2.The set length of armature coil 1 is greater than the set length of superconducting coil 4, because it is more much lower than forming superconducting coil 4 costs to form armature coil 1.When internal part 5 moves back and forth with respect to external component, superconducting coil 4 keep with the axial length that holds armature coil 1 on external component 2 concentric.
Cryostat 6 surround superconducting coils 4 and with inner radial zone (or core body) 9 thermal insulation of internal part 5.This zone 9 is essentially solid and is made of mild steel.By subcolling condenser 10 is the suitable cooling agents of cryostat 6 supply, and this subcolling condenser is positioned at the end of internal part 5 and with internal part 5 reciprocating motions.The excitation system 11 that is used for superconducting coil 4 is positioned at the same end of internal part 5, and also with internal part 5 reciprocating motions.Excitation system 11 comprises conventional power supply electronic device, controller and protective device, thereby is superconducting coil 4 supply DC electric currents.Is excitation system 11 and subcolling condenser 10 power supplies by the flexible cable (not shown) from remote source.
Outer surface on the axial length that holds superconducting coil 4 of internal part 5 is formed by lining 12, and for example copper or aluminium constitute this lining by high-conductivity metal.Lining 12 forms the low impedance path of vortex flows, so that shielding superconducting coil 4, make it exempt from the AC magnetic flux that harmonic wave in the armature winding and load variations cause, otherwise this AC magnetic flux will cause superconducting coil 4 heatings.
Fig. 5 illustrates internal part 5, wherein removes lining 12 and cryostat 6.Clearly illustrated the support section 13 of internal part 5 among the figure, this support section is formed for holding the groove of superconducting coil 4.Support section 13 remains on and superconducting coil 4 approximately uniform working temperatures, and can be made of any suitable nonmagnetic substance such as stainless steel that has suitable mechanical property and thermal characteristics under this working temperature etc.Gap between the inwall of superconducting coil 4, support section 13 and cryostat 6 comprises that high vacuum (is lower than 10
-3MBar), this high vacuum keeps thermodynamic barrier with multilayer heat insulation.The inner radial wall of the part that is cooled that cryostat 6 is limited is made of solenoid 14.Solenoid 14 is connected to support section 13, superconducting coil 4 and cryostat 6 on the axle of internal part 5 at one end place.As shown in Figure 6, solenoid 14 by thermodynamic barrier is provided high vacuum and the diameter of axle of multilayer heat insulation and internal part 5 to spaced apart.Solenoid 14 provides mechanical support for the parts that are cooled, and the temperature gradient between the axle of be cooled parts and the internal part 5 of relative heat is provided.The heat that solenoid 14 is designed to conduct to cold parts remains on acceptable level.Solenoid 14 can be relatively low by heat conductivity and material such as stainless steel or Inconel_ formations such as (high-strength nickel ferrochromes) that intensity is higher relatively.As selection, a lot of composite materials can provide enough mechanical support and the low heat conduction of appropriateness.
Extend along the axial length that accommodates superconducting coil 4 in the inner radial zone 9 of internal part 5, and be made of solid-iron basically.In this embodiment, it is porose 29 that the center in inner radial zone 9 is provided with, thereby provide optional passage for cooling agent and the power supply lead wire (not shown) from subcolling condenser 10 and excitation system 11.Yet, be appreciated that, this hole is not essential parts of the present invention, in some cases, preferably, make internal part 5 whole for solid core and make cooling agent and current feed is guided the superconducting coil supporting construction of 9 ends, inner radial zone into, and between each coil, use the connection lead-in wire of HTS material.The magnetic field that inner radial zone 9 is produced for superconducting coil 4 provides low magnetic resistance flux path.The residue axial length that internal part 5 is positioned at superconducting coil 4 outsides forms the steel pipe 16 of hollow, so that make the weight of internal part and cost minimum.
To understand the magnetic pole that produces in this motor better with reference to Fig. 7.When this tubular electrical machines work, each superconducting coil 4 has the electric current that flows around it.This means the magnetic field of existence around each coil.But axially adjacently each other flow towards opposite direction, make around the magnetic flux in the magnetic field of each coil opposite to the flow direction in the magnetic field of adjacent one or more coils with threaded shaft by the electric current in support section 13 superconducting coil at interval.These opposite magnetic fields impel in the gap between every pair of superconducting coil 4 that (that is, in the occupied zone of support section 13) magnetic flux is towards radially, and produces north and south poles alternately along the length of superconduction winding.Although the superconducting coil 4 that shows three axial inner among Fig. 6 is made of two axial adjacent and coils contact, this for no other reason than that for the above reasons these coils have cause than two the end-coil 4a and the more number of turns of 4b.Because the electric current in each coil has identical polarity, shown in arrow among Fig. 5, therefore the superconducting coil of two contacts should be thought single coil.In other words, the superconduction winding that is made of the superconducting coil 4 of axially spaced-apart has and the essentially identical effect of row's permanent magnet.Yet, the field density that the field density that superconducting coil 4 can produce can produce much larger than permanent magnet.In order to keep having consistent field pattern along the length of superconduction winding, end- coil 4a and 4b have than central coil number of turns BSCCO-2223 band still less, but have the electric current supply identical with central coil.Every pair of superconducting coil 4 forms a magnetic pole of tubular electrical machines, and the total quantity of magnetic pole depends on the rated value of machine.To example shown in Figure 7, there are four magnetic poles at Fig. 1.
As above simply described, internal part 5 is with respect to external component 2 reciprocating motions, and supported by the bearing (not shown) at each end.Except the cooling and excitation of superconducting coil 4, tubular electrical machines of the present invention is according to working with the essentially identical mode of conventional permanent-magnetic cylindrical type motor.
This embodiment of the present invention can be according to the mode identical with conventional tubular electrical machines as motor or generator work.The advantageous applications of this embodiment of the present invention is as generator, is used for producing electric power at offshore position from wave energy.This tubular electrical machines is connected with power supply electronic conversion equipment (not shown), and under the simple working pattern of this machine, this is converted to the required fixed frequency electric energy of electrical network with the variable frequency electric energy that this tubular electrical machines produced.
Fig. 8 illustrates the second embodiment of the present invention, except the external component 2 of tubular electrical machines comprises in addition the electromagnetic shield 17 that this embodiment and above-mentioned first embodiment are basic identical.In this instantiation, electromagnetic shield 17 comprises about 180 plane steel fin or plates 18 that radially extend, and this steel fin or plate 18 are fixed around the axis that the outside of external component 2 is parallel to tubular electrical machines with the circumferential spacer ring of rule.It is thick that steel plate is typically about 10mm, but as the case may be, can use other thickness such as 5mm, 20mm or even 50mm.Electromagnetic shield 17 is avoided overflowing from tubular electrical machines from the stray flux of superconducting coil 4 in the course of the work.This point is very important because superconducting coil 4 will be with respect to the motion of its surrounding structure, and if conductive structure quite near, this may be a problem.Electromagnetic shield 17 forms by this way: promptly, make plate 18 with along tubular electrical machines axially and the principal direction of stray flux radially parallel, and so provide low-resistance magnetic flux path along this principal direction.Electromagnetic shield 17 is not circumferentially continuous, because will help flowing of circumferential vortex flow like that, therefore causes the eddy current losses of not expecting.Although do not show that plate 18 can stretch out from outer surface, thereby as the cooling fin.
Fig. 9 illustrates the third embodiment of the present invention, and except the external component 2 of tubular electrical machines comprised electromagnetic shield 27 (can be used as and select to substitute the shielding part that is comprised among second embodiment) in addition, this embodiment and above-mentioned first embodiment were basic identical.In this example, electromagnetic shield 27 comprises a plurality of axial rod irons, and these rod irons radially are formed in the external component of tubular electrical machines with circumferential spacing with primitive rule.Each rod iron is all identical, and has the basic cross section for circle of about 10mm diameter.Yet, should be appreciated that these sizes only provide as guidance, according to the size and the design of the employed machine of rod iron, can use rod equally with other cross section and diameter.Electromagnetic shield 27 is worked according to the mode identical with the shielding part described in the second embodiment of the present invention, and electromagnetic shield 27 is avoided overflowing from tubular electrical machines from the stray flux of superconducting coil 4 in the course of the work.Electromagnetic shield 27 forms by this way: promptly, make these rods for axial, and therefore provide the low-resistance magnetic flux path for the stray flux along this direction.Electromagnetic shield 27 is not circumferentially continuous, because will help flowing of circumferential vortex flow also therefore to cause the eddy current losses of not expecting like that.
The internal part 19 of fourth embodiment of the invention is shown among Figure 10 and Figure 11.The external component of this embodiment is identical with the external component of first embodiment, does not therefore illustrate.Except inner radial zone (or core body) 20 of internal part 19 is cooled to the working temperature identical with superconducting coil 22 by cryostat 21, internal part 19 is similar to the internal part of first embodiment.Internal part 19 also comprises two ends 26, this two end portion supports bearing (not shown)s and be connected with the remainder of internal part by steel solenoid 23.Subcolling condenser 24 and excitation system 25 are fixed in an end, and described subcolling condenser is worked according to the mode identical with the first embodiment of the present invention with excitation system.The part that internal part 19 is positioned at solenoid 23 inner radial is a hollow, so that make its weight minimum.Figure 11 shows the internal part 19 that has removed cryostat 21.Inner radial zone 20 remains on the temperature identical with superconducting coil 22, and preferably is made of the iron that contains 9% nickel (9% ferronickel).This material has suitable magnetic characteristic, thermal characteristics and mechanical property under the HTS working temperature.Magnetic material with more a high proportion of nickel (for example 36% or 70%) also can use, but along with nickel content increases, the cost of material increases and the saturation flux density of material reduces, and this does not expect.
Outer surface on the axial length that holds superconducting coil 22 of internal part 19 is formed by lining 30, and for example copper or aluminium constitute this lining by high conductivity material.This lining 30 forms the low impedance path of vortex flows, so that shielding superconducting coil 22, makes it exempt from the AC magnetic flux that harmonic wave in the armature winding and load variations cause.
Claims (34)
1. tubular electrical machines comprises:
The radially outer parts, it has the basic columniform inner surface that is;
The inner radial parts, the inside that it is arranged on described external component coaxially makes that described internal part can be vertically with respect to described external component reciprocating motion;
The armature coil of a plurality of axially spaced-aparts, it is electrically insulated from each other and forms the part of one of described external component and internal part; And
The superconducting coil of a plurality of axially spaced-aparts, it forms in described external component and the internal part another a part;
Wherein, in the course of work of described tubular electrical machines, each superconducting coil remains on superconducting state, and electric current is supplied to each superconducting coil by this way, and is promptly opposite around the mobile direction of the electric current direction that flows and the electric current that centers on axially adjacent one or more superconducting coils of each superconducting coil.
2. tubular electrical machines according to claim 1 also comprises making described superconducting coil remain on the low-temperature cooling system of superconducting state.
3. tubular electrical machines according to claim 1 and 2, wherein,
Described external component comprises the basic columniform outer surface that is.
4. according to each described tubular electrical machines in the claim 1 to 3, wherein,
Described armature coil is formed by the enamel-cover twisted wire that at least one circle twines basically.
5. according to each described tubular electrical machines in the claim 1 to 3, wherein,
Described armature coil is formed by the copper twisted wire of transposition fully basically.
6. according to each described tubular electrical machines in the claim 1 to 3, wherein,
Described armature coil is formed by the aluminium twisted wire of transposition fully basically.
7. according to each described tubular electrical machines in the claim 1 to 6, wherein,
Described armature coil is separated each other vertically by insulation gap spare.
8. tubular electrical machines according to claim 7, wherein,
Described insulation gap spare is made of the expoxy glass composite material basically.
9. according to claim 7 or 8 described tubular electrical machines, wherein,
Each insulation gap spare comprises a plurality of radially extensions and circumferentially spaced heat conductive rod.
10. tubular electrical machines according to claim 9, wherein,
Described armature coil forms the part of described external component, and described heat conductive rod stretches out the radially-outer surface of described insulation gap spare and stretches in the described external component.
11. according to claim 9 or 10 described tubular electrical machines, wherein,
Every heat conductive rod is made of steel and cross section is circular, and its diameter is less than 5mm.
12. according to claim 9 or 10 described tubular electrical machines, wherein,
Every heat conductive rod is made of steel and cross section is a rectangle, and the length on each limit of cross section is less than 5mm.
13. according to each described tubular electrical machines in the claim 1 to 12, wherein,
Described armature coil links to each other to form three-phase AC winding.
14. according to each described tubular electrical machines in the claim 1 to 13, wherein,
Described superconducting coil is made of at least one circle high temperature superconducting materia.
15. according to each described tubular electrical machines in the claim 1 to 14, wherein,
One the surface adjacent with described superconducting coil formed by the lining of high-conductivity metal in described external component and the internal part, and described lining is at least in described external component and internal part on another the axial length that holds described superconducting coil.
16. tubular electrical machines according to claim 2, wherein,
Described armature coil forms the part of described external component, and described superconducting coil forms the part of described internal part.
17. tubular electrical machines according to claim 16, wherein,
At least being positioned at internal part on the axial length of inner radial of described superconducting coil is essentially solid and is made of magnetic material.
18. according to claim 16 or 17 described tubular electrical machines, wherein,
Described low-temperature cooling system remains on the working temperature identical with described superconducting coil with described internal part.
19. tubular electrical machines according to claim 18, wherein,
Described internal part is made of 9% ferronickel.
20. according to claim 16 or 17 described tubular electrical machines, wherein,
Described internal part is by heat shield piece and described low-temperature cooling system thermal insulation.
21. tubular electrical machines according to claim 20, wherein,
Described internal part is made of mild steel basically.
22. according to each described tubular electrical machines in the claim 16 to 21, wherein,
Described external component is made of concrete basically.
23. according to each described tubular electrical machines in the claim 1 to 22, wherein,
Described external component comprises electromagnetic shield.
24. tubular electrical machines according to claim 23, wherein,
Described electromagnetic shield comprises the circumferentially spaced a plurality of metallic plates of outer surface around described external component.
25. tubular electrical machines according to claim 24, wherein,
Described metallic plate is fixed in the described external component, makes the parallel axes of described metallic plate and described external component and arrange around the circumferential compartment of terrain of the outer surface of described external component.
26. according to claim 24 or 25 described tubular electrical machines, wherein,
Described metallic plate is made of steel.
27. according to each described tubular electrical machines in the claim 24 to 26, wherein,
Described metallic plate is that about 10mm is thick.
28. according to each described tubular electrical machines in the claim 24 to 27, wherein,
Described metallic plate stretches out from the outer surface of described external component, makes described metallic plate can also be used as heat exchanger.
29. tubular electrical machines according to claim 23, wherein,
Described electromagnetic shield comprises a plurality of rules axial metal bar at interval that is formed in the described external component.
30. tubular electrical machines according to claim 29, wherein,
Described metal bar is made of steel.
31. according to claim 29 or 30 described tubular electrical machines, wherein,
Every metal bar has the basic circular cross section that is, its diameter is approximately 10mm.
32. according to each described tubular electrical machines in the claim 1 to 31, wherein,
Described armature coil and superconducting coil have at least approximately diameter of 200mm.
33. according to each described tubular electrical machines in the claim 1 to 32, wherein,
The axial length of described internal part is approximately the twice of the axial length of described external component.
34. according to each described tubular electrical machines in the claim 1 to 33, wherein,
In the course of work of described tubular electrical machines, it is static that described external component keeps, and described internal part is vertically with respect to described external component reciprocating motion.
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| GB0600964A GB2434489B (en) | 2006-01-18 | 2006-01-18 | Tubular electrical machines |
| GB0600964.1 | 2006-01-18 |
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| EP (1) | EP1811638B1 (en) |
| JP (1) | JP5448296B2 (en) |
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| AU (1) | AU2006252043B2 (en) |
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| GB (1) | GB2434489B (en) |
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| US5212416A (en) | 1990-11-29 | 1993-05-18 | The Furukawa Electric Co., Ltd. | Primary coil assembly for a superconducting linear induction motor |
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| JPH09182408A (en) * | 1995-12-27 | 1997-07-11 | Hitachi Metals Ltd | Linear motor |
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| JP2001008430A (en) * | 1999-06-16 | 2001-01-12 | Nikon Corp | Motor device, stage device, and aligner |
| US6509819B2 (en) | 1999-07-23 | 2003-01-21 | American Superconductor Corporation | Rotor assembly including superconducting magnetic coil |
| WO2001052393A1 (en) | 2000-01-11 | 2001-07-19 | American Superconductor Corporation | Hts superconducting rotating machine |
| US6590305B2 (en) * | 2001-05-15 | 2003-07-08 | General Electric Company | High temperature super-conducting synchronous rotor having an electromagnetic shield and method for assembly |
| DE10138681C1 (en) * | 2001-08-07 | 2003-04-30 | Festo Ag & Co | Electrodynamic linear direct drive and method for manufacturing its coil system |
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2006
- 2006-01-18 GB GB0600964A patent/GB2434489B/en active Active
- 2006-04-27 US US11/413,035 patent/US7554240B2/en not_active Expired - Fee Related
- 2006-11-28 EP EP06077223A patent/EP1811638B1/en not_active Not-in-force
- 2006-11-28 NZ NZ551653A patent/NZ551653A/en not_active IP Right Cessation
- 2006-12-14 AU AU2006252043A patent/AU2006252043B2/en not_active Ceased
- 2006-12-21 JP JP2006344514A patent/JP5448296B2/en not_active Expired - Fee Related
-
2007
- 2007-01-15 NO NO20070265A patent/NO20070265L/en not_active Application Discontinuation
- 2007-01-16 CA CA2574153A patent/CA2574153C/en not_active Expired - Fee Related
- 2007-01-18 CN CN2007100002685A patent/CN101005234B/en not_active Expired - Fee Related
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| CN101976989A (en) * | 2010-10-08 | 2011-02-16 | 中南大学 | Active magnetic bearing cylindrical linear motor |
| CN101976989B (en) * | 2010-10-08 | 2012-12-19 | 中南大学 | Active magnetic bearing cylindrical linear motor |
| CN105830322A (en) * | 2013-12-20 | 2016-08-03 | 富士机械制造株式会社 | Linear motor device |
| CN105830322B (en) * | 2013-12-20 | 2018-12-28 | 株式会社富士 | Linear motor |
| CN106533117A (en) * | 2016-12-10 | 2017-03-22 | 中国人民解放军国防科学技术大学 | Superconducting linear DC motor |
| CN109915308A (en) * | 2017-12-01 | 2019-06-21 | Z光谱创新设计有限责任公司 | A kind of device for the generation energy from wave |
| CN107896020A (en) * | 2017-12-20 | 2018-04-10 | 宝龙电子集团有限公司 | A kind of drive motor |
| CN107896020B (en) * | 2017-12-20 | 2024-04-12 | 浙江宝龙机电有限公司 | Driving motor |
| CN112930641A (en) * | 2018-09-28 | 2021-06-08 | 劳斯莱斯德国有限两合公司 | Motor and hybrid electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2434489A (en) | 2007-07-25 |
| JP5448296B2 (en) | 2014-03-19 |
| AU2006252043B2 (en) | 2010-10-07 |
| US7554240B2 (en) | 2009-06-30 |
| NZ551653A (en) | 2008-05-30 |
| EP1811638A3 (en) | 2008-06-18 |
| CN101005234B (en) | 2011-01-26 |
| CA2574153C (en) | 2014-05-13 |
| EP1811638A2 (en) | 2007-07-25 |
| NO20070265L (en) | 2007-07-19 |
| GB0600964D0 (en) | 2006-03-01 |
| CA2574153A1 (en) | 2007-07-18 |
| EP1811638B1 (en) | 2013-03-27 |
| JP2007195396A (en) | 2007-08-02 |
| GB2434489B (en) | 2011-04-20 |
| US20070164615A1 (en) | 2007-07-19 |
| AU2006252043A1 (en) | 2007-08-02 |
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